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      12-17-2013, 05:10 AM   #1
F20MAW73
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M135i sound generator question

Just wondering how the sound generator interconnects with the car on the M135i in terms of any wiring or coding etc?

Maybe a silly question but can it be retrofitted on other models to create more engine cabin noise?

I've just ordered the m performance exhaust system for my 125i and the above could also be but the above could also be a solution if possible to retrofit?

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      12-17-2013, 06:30 PM   #2
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The BMW Orchestra

Here the pictures show the units. Here hopefully the first picture shows the unit you posted. There is a bunch wire already there, so if you must have the unit you probably need to figure out about the wiring.

Another picture here shows there is another box that the sound box connects to, and yet more wiring, and I am not sure what it does. I guess it never hurts to find out what the installation cost would be in its entirety, if it includes more than the box.

Good luck and cheers~
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      12-18-2013, 10:56 AM   #3
F20MAW73
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^ Thank-you for the photos.

Looks like this is the wiring harness for it.

http://www.realoem.com/bmw/showparts...34&hg=65&fg=22

I think the second photo you posted looks like HK amplifier.

http://www.realoem.com/bmw/partgrp.d...70&hg=65&fg=25

Looks far to complicated and certainly beyond me to retrofit unfortunately.
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